Ring-grinding machine



E. B. GARDNER. BWG GRINDING MACHINE. APPLlcmoN man DEc.s, |920.

Patented Nov. 28, 1922.

2 SHEETS-SHEET l.

E. B. GARDNER.

RING GRINDING MACHINE.

APPLICATION FILED DEc.9.1s2o.

Patented Nov.` 28, 1922.

2 SHEETS-SHEET 2.

` compan A dinlg tools on the line of ig, 1;

mi Nw; 28,1922. e -1,436,159

e UNiTEos'rn'rl-ss PATENT OFFICE..

nnwniin ia. amm or nnnorr, Assieme 'ro einem 'roon comm, or nnnorr, wisooivsni, e conronn'rxon or wisconsin. Y

reputation nea members, im. .semi se. 42am.

A w substentielly To alljwholm 'it may c mwem: l Fig. 3 is e fragmentary vi Bte. it known that I, Epwnao B. GARDNER, on the line 3- 3 of 1. e 'citizen of the UnitedStates, residing et' l dingma/ohine itself, to which theY A Ait for the grinding of eertainnew sind piston rings,"s attaclieble, may be of any 1(vivellmniovvndlor ipiraflei'rilajd cgnstruction .ci ou ein e, ut rpurposes'o illustreoiix in this instance, I have selected grindg. grindingl'mechine the detailed conetru ng to'ma.- tion of w eh's fully shown end described chinos adapted for grinding or finis g the in eoendn application, Serial No. 42,357- lateral edges'of piston rings, nlthouh it may filed ovem 26, 1920. Referring to :the be used for operating upon othero jects for ding machine generally, and to Asuch desimlar pu oses. l tails thereof only -as will be neceseer to an One of t e primary obiects of m invennderstanding of my present inven ion, tion is to provide e machine of the c coter -will' be observed Fig. 1 that fthe ma d whchwill simultaneously and-aiichine comprises a Blite .5 upon the top of finish both sides of a iston' rin which two carnefice-6 en end accurately so that im nishe mounted to slide ongitudinally of the frame ell be of the seme thickness. and .toward and from each.other. In the cerringe' 6 in journeled e `shedt 8 c arr .ing et f the invention is to proone end e grinding tool 9, end jsum l in for holding the piston the4 carriage "I, thercie 'ournaled a 11 g to end from the dcarrying e 12, arranged. mopted-to y posed relation to e tool 9. The shafts 8 rotate so ra. idly roand 11 are rotate t teted or spun hy the grinding too during in the sume direction suitable drivthe grinding operation to thus impart a, bet. lng means, and the sha. o' may b e' directlyv ter and more-,uniform finish than would be connected to motors or driven hgmeens of seoii'red if the rings were stationsrily held belts 10 and 20 from any suite source oi -during the grind operation. wer. 0,

Other features o the invention reside in 'The carri of ineens for retaining the bring the grinding tools into ope respective holders during their lation with s between them so and 'from the grindinools. that both faces o the nnhwill be operated and in the revision ofmeens for au atiupon .siniulteneouslrby4 e tools endy am celltmstopping the spinning or the rotation intcrmittentlv with own from each other of rings after the are withdrawn from 'to rmit the insertion of u new ring and the the tools, in order tha they may he removed wi drew ed from the holders end repeced by other rings with a minimum consumption of time.

Beloit, in the muy ef Reek ine. smanimahamsm' adapting Wisconsin, have invented useful Improvements in lingrinding ihmes, of which the following is e. specificaion.

This invention relatesin general to io i machines, and moreperticulerl Another object o vide novel means rings and conveyin ing tools, which means isade that the rings will es ere moved on the frame to the provision rings on their travel. toward instan the carriage presen other objects and muy, of the attendent with t depending mk is @muy t n aransadventages of my invention will be apar@ ing with a pinion 14 mounted upg ciated as the seme becomes better und d`verse1y extending shaft 15, and e @mais b ,e reference to the following 'on, 7 has en n.rin 16 pivotally connected there w en considered in connection with t eecand provided et its free end with -drawin also pted to mesh. with the Referring to the wi The rackl'f islield in mesh with Fig. 1 is a side elevation of machine em- .b a cam or. other inoun 'bo'd g. my invention; aft'18,which.ma`y be .edinsted to sectional view teken the reck with, or dicen l it 'from the pinand substantially ion bymmeans' of an admitting hiindle 19. end The s it 15 is rotated m aclockwisedirecf.

g.2 is a transverse between the grin 7 respectivelyere retive re upon e'- 7 tion to move the grindin tools toward each other into grinding posi ion-by means of a weight 21 suspended from a lever 22 fixed to the shaft, and the shaft is rotated in a iluenee of the wei ht 21 by means of a lever 28 fixed to the s a'ft and rovided at its outer end with a follower 2 adapted to be intermittently actuated by automatic mecha- 10 nism which will be latcr described, whereby. upon' movement of this lever upwardly a separating movement is im arted to the grinding tools. Each 'ding tool has a of abrasiv materlal adjacent its peisp ery, as indi tedby reference character the radial thickness of thisy rilg being Jauch that a piston ring when di os in po 'sitien to be operated upon by t e. tools, extends completely aorossthe width or radial thickness of the abrasive material so that this) material-ig wt'n down vvgnly instead of ein'gperip era y go y the wear resul from thegrinding as' it would be if thrmV did not extend entirely yacross the gun nt of the machine is equipped with a face plate 26 provided with an undercut ,slot 27, and towhich is-securedby bolts 28 an upwardly extending bracketor stand-A Vard 29.- The upper end of this standard is provided with an elo 'ated journal bearing 31; in `which ls iolnna ed E shatit having Afixed one end thereof, a r wheel 83, and on the o ote end, a disc-shaped earrior 34' 'Tins carrier is provided'pear its perimeter with a plurality of bearings. 35, ineach of which is' rotatablymounted a short shaft 86 ca 'ait'oneend in rox imity to 4the .iace of. t carrier, adisc orv holder 8?, adapted to" receive a piston ring', indicated by 38, which is placed in position thereon by slipped over the holder. The op te en of 'each shaft 86 has se; ourdld ereon a' cllar 89 by which the slt is, l against tu dxspla oem these collars also as brake drum's for "ffmi "ihitf-1piihn e carrier 1s e ongi of the machine fram; reason of a bolted connection to the base' p 26 so .that when pro ly adjueted,the 'lacie-pf the holders 'I .ies intermediate c tools 9 end 12, and when thetoo are caused to approach each other, th ring positioned upon that ho der which prjes between 'the ytools is su'b ecte'cl to the'action 'of the two too which nish the lateral surman 4therin. The holders 87 are `course,'th-inner t an the so that they o0 are netz-.ground down by the. action of the tools gli the ring.. n

A3 movement equal to the spacin between jacent ring elders is-impa to checar-ner a4 intermittently te bijng un et holders with the rings thereon successively countercloclrwise direction against 'thegi'nfjournaled in suitable -ea'ch other.

.an which .co-operates. with an adj of abutment stop on the into position between the grinv tools to be operated u n thereby. for accom l' this Intermittent move ment of e carrier comprises 'a shaftal lac-:args upon the front of the machineY and co antly driven by a belt E or other suitable driving mechamsm. Upon the shaft 41 there is mounted asectorgearfiadatedtomeshateach revolution of the shaft 41 with the r 83, 75 whereby at'each revolution of the e ft il, a quarter revolution is imparted to the oar rier.

' In order that the carrier may be locked against accidental movement 'dui-.in .the 80 grindin operation upon each ring, have provide 'an automatic locking mechanismr comprising a locking pin 44 normally urged by a. springe into ent. with the locking notches 6 formed 1n they of the carrier. These notches-are so positioned that one of them may be brought into alignmenttoreceivethel pinljust as the sector gear 43 leaves or ceases to mesh with the gear 3 3. y'll-or the purpose of re- 90 leasing the in.` M from locking relation with theca er 'ust prior tore-engagement of the vgear 313,4 have mounted upon the shaft 41 a cam 47, which, u on each revolution of the shaft' e outer end 48 95 of a'lever 49 fulcrnme at 51 on the frame of the machine and connected .52 yby pm and a slot connection with the loclnug pin 44. if] y Upon the shaft 41, there is-also mounted 100 a cam 53 in the path ofthe follower 24 earried b the arm 28, and this camis so de` and. positioned that substantially .sign

sim taneous'ly with the rele of the lockpiiig lpin 44, this cam eleventh-:iba lever 105.

23 to thereby, through therehk and pinion connections, withdraw the carri 6 and fr with on4 guiding uns a nn 121mm uri the time that the tools are held s. art withdraw t e dnished rin and inmdu another ring ,between the when Vthe carrier is again locke 44, the, cam 53 travels from beneath the' lole whereu -n d with apin '1owei- 24, permitting the tools to be' moved Lis together again into grinding relation with e positioned ring by means of the weight 21, as Previous1 explained. The mguisite distancejis main ained between the gnndixg tools by means of stop mechanism inclu 12o i astop bar54 mounted on ythe ca i?, e

6 to there f limit the approach of thetoo s. The dem of this stop mechanism am fully disclosed 12'. in the co-pending application above referred to'and since ang sui v le stop mechanism. mayj-be employe in lieu thence a detaileddescription of this structure is lieved to` beunneceseery in this application.

periphery nella vin indenne im The ring being operated upon by the grinding tools, is caused to rotate or spin 'rapidly by the action of the tools thereon and when the tools are withdrawn and the carrier is indexed, the spinning or rapid rotation of the ring just finished and the holder upon which it is mounted will continue. In order to stop this spinning so that the finished ring may be manually removed from y the holder, I have provided a brake device consisting, as shown in Fig. 3, of a lea spring fixed at one end upon a bracket 56 carried by the standard 29 and having' its free end normally urged upwardly into the path of travel of the collars 39 of the ring holders by means of an adjustable set screw 57.` It will be manifest therefore, that as the rotating holder is moved from position between the tools to the lower position illustrated in Figs. 2 and 3, the collar 39 thereof will be frictionally engaged by the brake spring 55, whereby the rotation of the holder will be stopped.

For the purpose of preventing accidental displacement of a ring from its holder, I have provided a guard or shield, disposed adjacent to the outer faces ofthe holders 37, this shield consisting of a fiat plate 58 adapted to overlie three of the holders, but to leave the fourth one, which is most remote from the grinding tools exposed for the removal and replacement of rings thereon. This shield is attached to a carriage by an upper bracket 59 and is also secured along jacent ative relation with the tools. `erations are automaticso that the operaor need only give his its lower edge to a stationary art of the frame. The shield is shaped at its edge adthe tools in conformity with the perimeter of the tool 12 so that the tool clears this inner edge in its Lmovement, the shield, however, overlyinga sufficient portion of the holder and ring to insure against accidental displacement of the ring from its holder.

It will be apparent from the foregoing that I have provided a ring grinding machine Which automatically grinds both faces of a ring simultaneously', and during the grinding operation causes the ring to rapidly rotateor spin, thereby insuring an even and uniform finish to the ring.' While one ring is being ground, the finished" ring at the opposite slde of the carrier may be removed and replaced by an unground ring whereupon the carrier is automatically indexed to bring the rings successively into .co-oper- All of the opatention t0 the removal the rings upon the hold-` and replacement of ers as they are successively presented into accessible osition.

It is belleved that my invention, its mode of operation and many of its-inherent advantages will be appreciated from the foregoin without further description, and it shou d be mainfest that the structural ydetails shown and described are capable of wide modification within the scope of the invention as defined in the following claims.

I claim:

1. In a ring grinding machine, the combination of means for simultaneousl grinding both faces of a ring, a carrier, an rotatably mounted means on said carrier for rotatably supporting a ring in position to be operated upon and freely rotated by said grinnding means.

2. In a ring grinding machine, the combination of ring inding means, a freely rotatable ring hol er,and means for bringing a ring on said holder and said grindin means in co-operative relation to thereby'e'ect the grinding ofsaid ring and the simultaneous rotation thereof by said grinding means.

3. In a ring rindin machine, the combination of a grin ing too a carrier, and means rotatably mounted on said carrier for holding a ring in operative relation to said tool so that the ring will during the grinding operation.

4. In a ring grinding machine, the combination of a pair of opposed grinding tools, a carrier, a pluarality of ring holders rotatbe rotated by said tool ably mounted on said carrier, and means for operating said carrier to position said holders successively in co-operative relation with said tools so that each ring is rotated with its holler during the grinding thereof by said too s.

5. In a ring grinding machine, the combination of a freely rotatable holder adapted to hold a piston ring, and means for acting on said ring to grind the faces thereof, said means causing the ring grinding operation.

6. In a ring rinding machine, bination of a pair of Opposed inding tools, a carrier, a plurality of ring olders rotatably mounted on said carrier, means for actuatin said carrier to move the rings on said hol ers successively into position to be operated upon by said tools, and means for stoppin the rotation of each ring upon the completion ofthe grinding operation there- 7-. In a ring grinding machine, the combination of a air of opposed grinding tools, a carrier, a plluurality of ring holders rotatably mounted on said carrier, means for intermittently actuating said carrier to position the rings on said holders successively between said tools, means for moving said tools intocontact with the positioned rin to effect the grinding of the fa'ces thereo and simultaneously cause said ring to rotate,

. and means for stopping the rotation of said inding machine, the comtools, urality the comto rotate during the :controlled b of ring holders each freely rotatable on said carrier, a gear Wheel connected to said carrier, an operating shaft, a gear sector mounted on said shaft and meshing with said gear wheel whereby an intermittent rotative movement is imparted to said carrier, and means for automatically locking said carrier between successive movements thereof.

9. In a ring grinding machine, the combination of a rotatable carrier, a plurality of freely rotatable ring holders mounted on said carrier, a pair of opposed grndin tools, an o erating shaft, means actuated by said sha t for imparting an intermittent rotary movement to said carrier to position the rings on said holders successively in cooperative relation with said tools, means said shaft for moving the grinding too s toward and from each other in predetermined relation to the movements of said carrier, and means for stopping the rotation of each holder after the ring carried thereb has been subjected to the action of said too s.

10. In a grinding machine, the combination of a rotatable carrier, a plurality of freely rotatable ring holders mounted thereon, means for intermittently imparting a rotary movement to said carrier, means for locking the carrier in the intervals between A successive movements thereof, and means for stopping the rotation of each holder at a predetermined point in the travel of said carrier.

11. In a ring grinding machine, the combination of grindin apparatus, a carrier, a plurality of ring ho ders rotatably mounted on said carrier, means for operating said carrier to move the holders with the rings thereon toward and from said grinding apparatus in succession, and means independent of said holders for retaining the rings on the holders during their movement toward and from said rinding apparatus.

12. In a ring grin ing machine, the coinbination of a grinding tool, aplurality of ring holders, means for moving said holders into co-operative relation with said grinding tool, and stationary means for retaining the rings on their respective holders.

13. In a ring grinding machine, the combination of a grinding tool, a plurality of ring holders, means for moving said holders in succession into (so-operative V)relation with `said tool, a stationary guard positioned in proximit to the ath of travel of said holders or preventing displacement of the rings from said holders during the travel of the holders.

EDWARD B. GARDNER. 

